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Electrical Machines

Electrical Machines
In a dc machine 4 pole lap winding is used. The number of parallel paths are?

 8
 2
 4
 1

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Electrical Machines
The frequency of voltage generated by an alternator having 8 poles and rotating at 250 rpm is

  50 Hz.
  16.67 Hz.
  25 Hz.
  60 Hz.

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Electrical Machines
Which 1 - Φ motor does operate at high power factor?

  Shaded pole.
  Capacitor run.
  Capacitor start.
  Split phase.

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Electrical Machines
The air gap between the yoke and armature is dc machine is kept very small

All of these
 to avoid locking of the armature.
 to achieve a stronger magnetic field.
 to avoid over heating.

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Electrical Machines
The wound rotor type IM is used for____________ speed operation.

  minimum.
  maximum.
  constant.
  variable.

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Electrical Machines
Transformers operating in parallel will share the load depending upon their

 rating.
 leakage reactance.
 percentage impedance.
 efficiency.

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MORE MCQ ON Electrical Machines

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